Improvement in vent-plugs



GEORGE WEAVER AND HORATIO N. ALLEN, OF BOSTON,- MASSACHUSETTS, ASSIGN- ORS TO THEMS'ELVES AND E. R. CHENEY.

Letters Patent No. 86,890, dated Febr'ua/ry 9, 1869. i

IMPROVEMENT IN VENT-PLUGS.

The Schedule referred to in these Letters Patent and making part o f the same.

To all whom t ma/y concern Be it known that we, GEORGE WEAvEE and Ho- RATIO N. ALLEN, of Boston, county of Suiiolk, and State of Massachusetts, have invented 'a new and useful Device for Preventing Ale-Barrels and other Caslis4 Containing Fennenting Liquors, Molasses, and other' Expansive Fluids, from Bursting; and we do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompainiug drawing, making a part of this specification, in Which- Figure 5 is a pla. I

Figure 4 is a section, and

Figures' 3, 2, and 1, are details, to be referred to hereafter.

Our invention consists in a valve, of peculiar con; struction, to be placed in the head or other part of a cask, and which will open at an)- given pressure, and allow the gas or fluid to escape, should the pressure arise above the retaining-capacity of the c ask, and which can be -adj usted to retain any desired number of pounds to the square inch.

In the accompanying drawingc, fig. 4, is the shell or case, containing the valve and its equipments, and is provided with a screw-thread on its outer surface, and is screwed into the head or other part of a cask, or secured in any other manner to bring it in contact with the contents of the cask.

b is a valve, with two stems, with a srnall hole, j; through its entire length, corresponding to the hole g in the case e. v

a is a regulating-screw, and contains the valve-seat i, illustrated by dotted line.

Acure -byLetters Patent, is l The combination of valve b, provided with hole j,

The valve-seat is made of wood, leather, or other material, placed firmly in its position, as represented. c c are springs, of rubber, or other suitable material, made in a proper form, and placed, as shown, on onel of the stems ofthe valve b.

limit, the valve l1 will raise off from its seat in the regullating-screw a, forcing it against the spring c c, and

allow the gas or fluid to escape through the aperture h, iig; 5, into and .through the passage f rl g, g. 4, 'to the open air, and close by the action of the spring, thereby securing it from bursting; also, under ordinary circnmstances, preventing the escape of the contents of the cask.

What we claim as our invention, and desire to seregulating-screw a, valve-seat fi, spring c, main plain or hollow, and shell e, all constructed land arranged substantially as shown and described. I

GEORGE WEAVER. HORATIO N. ALLEN.

Witnesses:-

A. C. CHASE, ALPHEUs WIsWELL. 

